Radiator



H KAUFMAN AND S. SCIENS.

RADIATOR.

APPLICATION FILED AUG-23. I919- Patented Oct. 19,1920.

1N V5 NT 0188 HA RRY KA UfTMAN' SAMUEL 561E 5. WT T ORA E V I 4 BYUNITED STATES PATENT OFFICE.

HARRY KAUFMAN'AND SAMUEL soIEN s, oFHAMM'oNn, INDIVANA.

RADIATOR.

To all whom it may concern Be it known that we, HARRY. KAUFMAN andSAMUEL SoInNs, citizens of, the United Stategresiding at Hammond, in thecounty of Lake and State of lndiana,"have intween adjacent radiatingunits constructed fromv thin metal such as sheet brass, by forming. acontinuous strip of the metal into rounded corrugations transversely ofthe strip, equally spaced, alternate ones of the corrugations on oneside of the/strip 7,

being extended to form spacing members to provide air passages throughthe completed radiator core. The corrugations adjacent the spacingmembers are flattened between the edges of the strip in the directionthe spacingmembers extend to form water passages in the completed core,extending vertically without interruption or change of direction'fromtop to bottom of the core. A metal strip thusjformed is folded adjacentone of the spacing members to contain the spacing members between thefolded portions of the strip, in whichposition the spacing membersalternate with each other and reinforce all of the inwardly projectingcorrugations of the unit. second unit of the kind described is placedagainst the side of the first unit in reversed relatiomthat is to saythe top of the second unit is the same as the bottom of the first unitand the right hand side of the second unit is the same as the lefthandside of. the first unit. In this position a continuous watertube isformed between the units extending vertically and the corrugations ofthe units fit each other so closely that when the core is assembled by'placing the desired number. of units together,theiedges of adjacentunits may readily be secured ,together by dipping them in melted solderwhich seals the edges of the water tubes.

.- Our invention will best be understood by reference to. theaccompanying drawings,

showing a preferred embodiment thereof, in which-- j v i Figure 1 is aperspective View of several units in assembled relation,

Fig. 2 is a sectional view of the parts shown in Fig. 1 taken along theline 2-2,

Specification of Letters'Patent.

Patented Oct. 19, 1920.

Application mea- August 23,;1919. Serial No. 319,305.

Fig. 3 is an enlarged end view of several units in assembled relation,and

Fig. 4 is a side elevation of a portion of one of the units shown inFig. 3,

Similar numerals refer. to similar throughout the several views.

As shown in the drawings and particup rt larly'Fig. 3, a stri'p'ofthin'sheet metal such 1 as brass is formed into a plurality ofcorrugations 10, 11, 12, 13, this series of corrugations being repeatedthroughout the whole length of the strip. The corrugation 10 pro ects tothe left of the plane of the origmal strip, for the position'of thepartsshown in Fig. 3, and hasa rounded outline, as have the similarlyprojecting corrugation 12, and the oppositely projecting corrugat on 13.The corrugation 11 extends oppositely to the corrugations 10 and 12,

andis continued in triangular form beyond the crest of the corrugation13 to form a spacing and reinforcing member. The corrugations describedextend from edge to edgeof the strip in which they are formed. Themidportions ofthe corrugations 10 and 112 are flattened as'indicated inF ig. 4

' at 10 12, beginning a short distance from either edge of the strip,the flattening being toward the corrugations 11 and 13; the ends of thecorrugations 10 and12 are not flattened but retain the same general formas the corrugations 13 for a sufficientdistance 7 from the edge of thestrip to facilitate soldering orbrazing adjacent units together to :forma complete radiator core.

A strip corrugated asdescribed is folded, preferably immediatelyadjacent a corrugation 13, so that the corrugations 11 extend towardeach other. The strip is cut of proper length to form a unit of theheight of the radiator core and-the cut ends are overlapped as indicatedat 14. In this position it will be noted that each corrugation llrestsagainst a corrugation13 on the other side of the unit, theseparts beingheld together when the core. is brazed or soldered.

A second unit is thenformed in the same manner from the same corrugatedstrip and placed in reversed relation against the first unit, so thatits folded portion is down and its lapped portion .is uppermost, and itscorrugations 10,11, 12, 13, closely engage the corrugations 11, 10, 13and 12 respectively. 'It will be noted that. for this relation of theunits,the flattened portions 10 and12 occur at each corrugation from topto bottom of the units, alternate ones of said flattened portions beingon one unit and intermediate ones being on the other unit. The flattenedportions are somewhat deeper than the corrugations in which they areformed and as a result, an uninterrupted passageway for water flow isformed between the units closed at its edges by the engagement of thecorrugations of the two units as above referred to.

As moreclearly shown in Fig. 2 the water passage thus formed is not ofuniform cross section throughout its length, but on the to collect dirtand foreign matter, it does not-flow through the passage with suchvelocity as to prevent radiation of its heat;

I as the Water enters each portion of increased cross section its flowis somewhat retarded by the slight eddy currents or whirls set up andthis affords an ample time interval of contact of the water with theradiating surfaces to insure eflicient cooling of the water.

The radiating surface of the air passages is relatively g eat as aresultof the corrugated construction of the units. Furthermore, the ends ofthe flattened portions, project an'appreciable distance into'the airpassages, and since said ends are oblique longitudinallly ofth'eflattened portions, the effect is that air will enterwith practically noresistance, the thin edged front ends of the air passages and strikedirectlya' ai'nst the inwardly projecting ends of said flattenedportions, after which the air in any air passage enters a portion ofdecreased cross section between said flattened portions and its velocityis increased,thus securing more effective cooling of the water than ifthe air flowed through passages of uniform cross section. v

The complete core is formed by assembling enough units in the mannerabove described to give the vdesired width of core, each unit being of alength equal to the height of the core. Alternate unit s occupythepositiondescribed above for the first unit, and the intermediateunits occupythe position described above for the second unit. The unitsthus assembled are held closely together by any suitable clamping means,and the adjacentedges of the units are secured together by brazing orsoldering, by -ipping or otherwise, which results in clos ing the edgesofthe water tubes including the open places in the end of thecorrugations 11, since in practice these are small enough to be readilyclosed as described, and at the same time each corrugation ll and thatthis 7 is securely fastened to the adjacent corrugation on the otherside of the same unit, thus making a strong rigid core.

lVhile we have shown our invention in the particular embodiment abovedescribed, it willbe understood that we do not limit ourselves to thisexact construction as we may employ equivalents known to the art at thetime of the filing of this application without departing. from the scopeof the appended claims.

.maining corrugations on both sides of strip eing of substantially thesame depth as each other, said strip beingfolded with said spac 1 mgmembers extendlng toward each other and engaging intermediate ones ofsaid corrugations on the inslde of the foldedstrip,

said units being held together by solder, the I corrugations on the sidethe sheet away from said spacing members being flattened betweenthe'edge portions'of the strip to form said water passages from top tobottom of the radiator between adj acent. units.

2. In a radiator, the combination of a plurality'of similar unitsassembled in reversed relation to form water passages be tween them,each unit comprising astrip of thin sheet metal of a'width equal to thethickness ofthe radiator, said strip having transverse corrugationsextending from both its sides across its full width, alternate onesof'said corrugations on one side of saidstrip projecting beyond theintermediate corrugations to form spacing. membersandthe remainingcorrugations on both sidesof strip being of substantially the same depthas each other, said strip being folded with said spacing membersextending towardeach other and engaging intermediate ones-of saidcorrugations on the ins'ideof the folded 1 strip, said units being heldtogether by solder, the corrugations forming'said spacing V v membersbeing of triangular cross section and the remaining corrugations beingof circular cross section, the corrugations on the side of the sheetaway from'said'spacing members being flattened betweenfthe edge portionsof the strip to form s'aidwater passages from top to bottom of theradiator between adjacent units. I

3. In aradiator, the combination of a plurality of similar unitsassembled'in reversed relation to form water passages be- 10 of stripbeing of substantially the same depth as each vother, said strip beingfolded with said spacing members extending ,to-[

ward each other andengaging intermediate ones of said corrugations onthe inslde of the folded strip, said units being held together bysolder, the corrugations forming said spacing members being oftriangular V deeper to form a spacing member, sa1d strip cross sectionandthe remaining corrugations being 'of circular cross section, sa1dcorrugations being of a form toleave vertical water passages between2LCl]2LCGI1t unlts,

the cross section of each vwater passage being unlnterrupted from top tobottom, :and smaller at each point of passing from one pair ofcorrugations to the next pair than it is between each pair ofcorrugations.

LA unit for a radiator comprising a strip of'thin sheet metal havingtransverse corrugations extending from both its sides across its fullwidth, alternate ones of said corrugations on one side of sa1d strip projecting beyond the intermediate corrugations to form spacing members andthe remalning corrugations on both sides of said 5 strip being ofsubstantially thesame depth as each other, said strip being folded withsaid spacing members extending toward each other and engagingintermediate ones of said corrugations on the inside of the foldedstrip, the corrugations on the side of the strip away from said spacingmembers being flattened between the edge portions of the striptowardsaidspacing members.

5. A unit for a radiator comprising a strip of thin sheet metal havingrecurring series of transverse corrugations formed therein, saidcorrugations having the same pitch distance along said strip, andeachseries of corrugations consisting of a first corrugation extending fromone side of the strip,

a second similar corrugation extending from the other side of the strip,a third similar 7 corrugation extending from said one side of thestrip,- and a fourth corrugation extending from the other side of thestrip,

7 the first three corrugations being of the same depth and the fourthcorrugation being deeper to form a spacing member, said strip beingfolded to form a unit bringing the fourth corrugations on each side intoen'- gagement with the second corrugations on the other side, the firstand third corrugations of each series being flattened between the edgeportions of the strip in the direc- 5 tion of the second and fourthcorrugations *without change of, shape of said first and. thirdcorrugations at the. edge portions of the strip.

6. A unit for aradiator comprising .a

strip of thin sheet metal having recurring series of,transversecorrugations formed therein, said corrugations having the same:p'itch distance along said strip, and each,

series of'corrugations consisting of a first -,.corrugation extendingfrom one side of the strip, a secondsimilar corrugation extending fromthe other side ofthe strip, a third similar corrugation extending fromsaid one sideof the strip, and a fourthcorrugation extending fromthevother side of the strip,f the first three corrugations-being of thesame depthand the fourth corrugation being being folded to form a unitbringing-the fourth corrugations on each side into en-v gagement withtheisecond corrugations of the other" side, the first three corrugationsof each series, being of circular cross sectionand the fourthcorrugation being of triangular cross section. v

7. A unitfor a radiator comprisinga strip of thin sheet metal havingrecurring series of transverse corrugations formed therein, sa1dcorrugations having the same pitch distance along said strip, and eachserles of corrugations consisting of a first corru ation extending fromone side of the strip,

a second similar corrugation extendingfrom one side of the strip, athird similar corrugation extending from said one side of the strip,and-a fourth corrugation extending from the other side of the strip, thefirstthree corrugations being of thesame depth and the fourthcorrugation being deeper to form a spacing member, said strip beingfolded to form a unit bringing the fourth corrugations on each side intoengagement with the second corrugations of the other side, the" firstthree corrugations of each series being of circular cross section andthe gations formed therein, said corrugations having the same pitchdistance along said strip, and each series of corrugations consisting ofa first corrugation extending from one side of the strip, a secondsimilar corrugation extending from the other side of the strip, a thirdsimilar corrugation extending from said one side of the strip, and afourth corrugation extending from the other side of the strip, the firstthree corrugations rugations at the edge portions of the strip.

" being of the same depth and the fourth cor- 9. A formed strip formaking radiator units comprising a strip of thin sheet metal 5 havingrecurring series" of transverse corrugations formed therein, saidcorrugations having the same pitch distance along said f strip, and eachseries of corrugations consisting of a first corrugation extending fromone side of the strip, a second similar corrugation' extending from theother side of the strip, a third similar corrugation extending from saidone side of the strip, and a fourth corrugation extending from the otherside of the strip, the first threecorrugations being 7 of the same depthand the fourth corruga- 7 tion beingdeeper, to form a spacing member,

the first three corrugations of-each seriesbeing of circular crosssection and the fourth corrugationbeing Oftllflllglllfll cross section.7 v p v w 10. A formedstrip for making radiator units comprising a stripof thin sheet metal having recurring series'of transverse corrugationsformed therein, said corrugations having the same pitch distance alongsaid strip, and each series of corrugations consisting of a firstcorrugation extendingfrom oneside of the strip, a secondsimilarlcorrugation extending 'fromthe other side. of the strip, a third similarcorrugation extending from said one side of the strip, and a fourthcorrugation extending from the other side of the strip, the first threecorrugations being of the same depth and the fourth corrugation beingdeeper to form "a spacing member, the first three corrugations of eachseries being of circular cross section and the fourth corrugation beingof triangular cross section, the first and third corrugations of eachseries being flattened between the edge portions of the strip in thedirection of the second and fourth corrugations Without change of shapeof said first and third corrugations at the edge portions of the strip.

.In witness'wh'ereof we "hereunto subscribe I HARRY KAUFMAN.

SAMUEL SCIENS.

our names this 18th dayof August, 1919. I

